Refactor docker

[deltaroe]

• Use local checkout instead of pulling from git during build
• Rearrange yarn installs and package.json copies to make more efficient docker layers.
  • Separate the node module installs into their own layers. They're less likely to change vs the rest of the node code.
  • This means multiple builds that don't change the dependencies don't need to reinstall the modules
• Don't use nodemon inside the docker container
  • It doesn't really make sense since the files don't change in a built container
  • This also resolves a fun issue I had with lots of attachments causing the container to run out of inotify watches
• Set PM2_HOME value
  • Otherwise it defaults to HOME which in this case is /data/db. If the mongo db directory is mounted externally and that mount doesn't support socket files (Thanks Azure Container Instances /s) it blows up as pm2 uses socket files

[hppanpaliya]

Thanks for your contribution, @deltaroe. These Docker optimizations are impressive. I’m excited to see how separating the node module installs and removing nodemon inside the container will streamline our builds. The pm2_home setting fix is a valuable lesson. Thanks for sharing these improvements!